Adding within 100
1st Grade


Alabama Course of Study Standards:
13

Add within 100, using concrete models or drawings and strategies based on place value. Add a twodigit number and a onedigit number.
 Add a twodigit number and a multiple of 10.
 Demonstrate that in adding twodigit numbers, tens are added to tens, ones are added to ones, and sometimes it is
necessary to compose a ten.
 Relate the strategy for adding a twodigit number and a onedigit number to a written method and explain the
reasoning used.

Arkansas Academic Standards:
1.NBT.C.4

Add within 100 using concrete models or drawings, relate the strategy used to a written expression or equation, and be able to explain the reasoning
Note: Strategies should be based on placevalue, properties of operations, and the relationship between addition and subtraction. 
Arizona Academic Standards:
1.NBT.C.4

Demonstrate understanding of addition within 100, connecting objects or drawings to strategies based on place value (including multiples of 10), properties of operations, and/or the relationship between addition and subtraction. Relate the strategy to a written form. See Table 1. 
Common Core State Standards:
1.NBT.C.4

Add within 100, including adding a twodigit number and a onedigit number, and adding a twodigit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding twodigit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten. 
Georgia Standards of Excellence (GSE):
1.NR.5.1

Use a variety of strategies to solve applicable, mathematical addition and subtraction problems with one and twodigit whole numbers. 
Louisiana Academic Standards:
1.NBT.C.4

Add within 100, including adding a twodigit number and a onedigit number, and adding a twodigit number
and a multiple of 10. Use concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a number sentence; justify the reasoning used with a written explanation.
 Understand that in adding twodigit numbers, one adds tens and tens, ones and ones; and sometimes it is
necessary to compose a ten.

North Carolina  Standard Course of Study:
1.NBT.4

Using concrete models or drawings, strategies based on place value, properties of operations, and explaining the reasoning used, add, within 100, in the following situations:
A twodigit number and a onedigit number

A twodigit number and a multiple of 10

New York State Next Generation Learning Standards:
1.NBT.4

Add within 100, including  a twodigit number and a onedigit number,
 a twodigit number and a multiple of 10.
Use concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.
Understand that in adding twodigit numbers, one adds tens and tens, ones and ones, and sometimes it is necessary to compose a ten.
Relate the strategy to a written representation and explain the reasoning used.
Note on and/or: Students should be taught to use strategies based on place value, properties of operations, and the relationship between addition and subtraction; however, when solving any
problem, students can choose any strategy.
Note: A written representation is any way of showing a strategy using
words, pictures, or numbers. 
Tennessee Academic Standards:
1.NBT.C.4

Add a twodigit number to a onedigit number and a twodigit number to a multiple of ten (within 100). Use concrete models, drawings, strategies based on place value, properties of operations, and/or the relationship between addition and subtraction to explain the reasoning used. 
Pennsylvania Core Standards:
CC.2.1.1.B.3

Use placevalue concepts and properties of operations to add and subtract within 100. 
Florida  Benchmarks for Excellent Student Thinking:
MA.1.NSO.2.4

Explore the addition of a twodigit number and a onedigit number with sums to 100 
